1. The following data is from a study designed to investigate drinking problems among college students. In 1983, a group of students were asked whether they had ever driven an automobile while drank. In 1987, after the legal drinking age was raised, a different group of college students were asked the same question.

Drove While Drinking	Year	Total
1983 1987
Yes No	1250 991 1387 1666	2241 3053
Total	2637 2657	5294

Use the chi-square test of association to evaluate the null hypothesis that population proportions of students who drove while drank are the same in the two calendar years. Use= 0.05. Show all hypothesis testing steps for full points.